Service Overview
Global CDN is a service that delivers static content stored in web servers or object storage to users more quickly and securely through numerous edge servers distributed across the global network. When traffic surges, it distributes the load of the origin server to protect the origin server, and by downloading content from adjacent edge servers, it can provide users with fast and stable web services.
Guide
Samsung Cloud Platform’s Global CDN service is provided through the services and infrastructure of the global CDN provider Akamai. Akamai informs that, in accordance with the Information and Communications Network Act, if it receives a list of URLs suspected of containing illegal information from the Broadcasting Media Communications Commission, it may take measures to restrict user access to those URLs.
Features
- Easy CDN Service Use: You can conveniently apply for Global CDN services through the web-based console of Samsung Cloud Platform. You can easily set the origin server settings of Samsung Cloud Platform and the caching policy settings of Global CDN edge servers, enabling rapid content delivery service usage.
- Improved Service Availability: Even if many users request content simultaneously, causing excessive traffic, thanks to edge servers distributed across multiple locations, users can access content quickly without degradation of usability. Therefore, when used for tasks that require stable global services, it ensures service availability.
- Safe content usage: HTTP, HTTPS, HTTP/2 protocols are supported, allowing content integration with various origin servers. If the cached content’s validity period expires or changes to the origin content are confirmed through validation, the edge server’s existing cache is deleted. Then, when a user requests content, the new content from the origin server is cached, so the user always receives valid, up-to-date content.
- Efficient Cost Management: Even in work environments that require large-scale traffic such as large file downloads, stable service is possible without the need for massive resource usage. Also, Global CDN usage fees are charged only for content usage, allowing efficient cost management.
Service Diagram
Provided Features
Global CDN provides the following features.
- Original Settings: Set the location and path of the original server and improve traffic reduction and response speed by providing basic compression of original content.
- Caching Settings: Set the cached content delivery policy and cache expiration time, and when the content’s validity period expires (TTL expiration), you can delete (Purge) the expired cached content on the edge server.
- Content Protection: By communicating with the origin server via the HTTPS protocol, the security of the content transmission path is strengthened, and with the powerful security features of the Global CDN network, you can protect content and users from DDoS attacks and web-based attacks.
Components
Connection between the source and the global CDN network
| Category | Description |
|---|---|
| Origin location and path setting | Based on the main name or IP address, set the origin server’s location, protocol, port number, and file path to connect the origin to the Global CDN network |
| Forward host header | Set the Host header value to be delivered to the user when requesting the origin server from Global CDN |
| Cache key hostname | Set cache key information to identify content on Global CDN Edge server |
| Custom header(request) | Custom header usage setting |
Table. Connection settings between the original and global CDN network
Caching in Global CDN Network
| Category | Description |
|---|---|
| Caching Options | Setting caching options on the Global CDN network using the origin server’s Cache-control and expiration time |
| Content Delivery Policy | Transmission policy setting based on validity according to TTL expiration |
| Cache expiration time | Set expiration time of cached content |
| Detailed Policy | Ignore query string, Range request, Custom header usage setting |
Table. Caching Settings in Global CDN Network
Constraints
The constraints of Global CDN service are as follows.
| Category | Description |
|---|---|
| Maximum number of domains that can be created per Account | 20 |
Table. Global CDN constraints
Region-specific provision status
Global CDN is available in the following environments.
| Region | Availability |
|---|---|
| Korea West (kr-west1) | Provided |
| Korea East (kr-east1) | Provided |
| South Korea 1(kr-south1) | Not provided |
| South Korea 2(kr-south2) | Not provided |
| South Korea 3(kr-south3) | Not provided |
Table. Global CDN regional provision status
Preliminary Service
Global CDN service has no preceding service.